lǎo shī chá yàn le wǒ men de shí yàn bào gào，zhǐ chū le lǐ miàn cún zài de jǐ chù cuò wù。

老师察验了我们的实验报告，指出了里面存在的几处错误。

The teacher checked our lab report and pointed out several mistakes in it.